Vallecitos Ridge

Vallecitos Ridge Biological Open Space Preserve (Preserve) is located in the City of San Marcos, north of SR-78, west of Interstate 15, and northeast of Palomar College. The 34.74-acre Preserve consists of two parcels, a 9.31-acre parcel north of Borden Road known as Vallecitos Ridgethe Raza Parcel and a 25.43-acre parcel south of Borden Road immediately north of the Vallecitos Ridge residential community referred to as Lot F. San Diego Habitat Conservancy (SDHC) commenced active management in March 2009.

History: This open space preserve was required to be set aside as mitigation for the Vallecitos Ridge residential development project. This project directly and indirectly impacted 22.85 acres of coastal sage scrub, requiring mitigation at a ratio of 2:1, i.e. the protection of 45.70 acres of coastal sage scrub. SDHC manages 34.74 acres of this total 45.70 acres

Habitat: The Preserve consists of 27.93 acres of Diegan coastal sage scrub, 4.15 acres of southern mixed chaparral, 2.20 acres of Diegan coastal sage scrub/southern mixed chaparral, and 0.45 acre of disturbed habitat.

Management Duties: SDHC monitors the Preserve on a triannual basis to observe and document substantial changes in the habitat composition and the need for remedial measures. Non-native, invasive plant species are removed as necessary. Surveys for the federally-threatened coastal California gnatcatcher are conducted every three years.  SDHC meets with the Vallecitos Ridge Home Owners’ Association (HOA) every other year and provides an article for inclusion in the HOA’s newsletter on an annual basis.

Species of Special Interest: Ashy spike-moss, coastal California gnatcatcher, northern harrier, orange-throated whiptail, rufous-crowned sparrow.

Chaparral Habitat
Diegan Coastal Sage Scrub Habitat
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Vallecitos Ridge Preserve map